Growing Terms beginning with R
- R-DWC
- Raceme
- Rachis
- Radiant Heat Loss
- Rain Barrel
- Rain Garden
- Raised Bed Gardening
- Rastafari
- Raw Cannabis
- Recirculating Deep Water Culture (R-DWC)
- Recirculating System
- Reclaim
- Recreational Marijuana
- Red Light
- Reefer
- Reeferphobia
- Reflector
- Refractometer
- REI
- Relative Humidity
- Residual Solvent
- Resin
- Resin Glands
- Restricted Entry Interval (REI)
- Reverse Gravity Bong
- Reverse Osmosis (RO)
- Rhizobia
- Rhizome
- Rhizosphere
- Rice Hull
- Rick Simpson Oil (RSO)
- Rimonabant
- RO
- Roach
- Rock Dust
- Rockwool (Stonewool)
- Rockwool (Stonewool)
- Rockwool Cube
- Rockwool Slab
- Rolling Paper
- Rooftop Hydroponic Greenhouse
- Root
- Root Ball
- Root Bound
- Root Bound
- Root Cutting
- Root Flare
- Root Maggot
- Root Mass
- Root nodule
- Root Pruning
- Root Rot
- Root Snorkel
- Root Stock
- Root System
- Root Vegetable
- Root Zone
- Rooting Hormone
- Rooting Hormone
- Rooting Medium
- Rooting Stimulant
- Rootstock
- Rose Blunt
- Rosette
- Rosin
- Rosin Extraction (Rosin)
- Rotary Evaporator
- Row Cover
- RSO
- Ruderalis
- Run to Waste
- Runner
- Runoff
- Russet
